Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000000212

Record: MDI000000000212

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Connell

Latitude: 51° 29' 34.58"    Longitude: -90° 5' 2.67"

UTM Zone: 15    Easting: 702414   Northing: 5708676    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52O08NE

Point Location Description: Centre of Stripped Area

Location Method: Field Visit with GPS

Exploration History

Central Patricia Mine Property: 1929: Trenching and diamond drilling of Central Patricia deposit by Central Patricia Mines. Trenching of No. 6 vein on Springer claims. 1930: Exploration shaft sunk at Central Patricia deposit. 1934-1951: Production of 621,806 ounces of gold and 58,349 ounces of silver from 1,729,248 tons of milled ore from the Central Patricia Mine. 1935: Exploration shaft sunk on Springer Claims. 1938-1940: Production of 13,158 ounces of gold from 18,886 tons of milled ore from Central Patricia No. 2 Shaft. 1980-1986: Geological, geophysical and geochemical surveys and diamond drilling by Golden Shadow Resources. 1986-1989: Geological, geophysical and geochemical surveys and diamond drilling by Noramco Exploration for Quinterra Resources and Pure Gold Resources. 2003 - 2006: Geological surveys and diamond drilling by King's Bay Gold and Richview Resources.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Pickle Lake

Geological Age: Mesoarchean  

Geology Comments

Dec 22, 2006 (Mark Puumala) - The geology of the Pickle Crow area is described in MDI52O09SE00007.

Lithology

Mineralization

Mineralization Comments

Dec 22, 2006 (Mark Puumala) - The Southwest Powderhouse Zone consists of two areas of gold mineralization in iron formation referred to as the A/B and 1347 Zones (Laderoute 1989b). The iron formation(s) occur within a sequence dominated by mafic metavolcanic rocks. Laderoute (1989b) notes that the mineralization in the A/B zone occurs in the hinge zone of a fold. The fold has been interpreted by Laderoute (1989b) to be an anticline (northeast-plunging) that has been folded about a northeast-striking axial plane (Powderhouse Lake Anticline). Considerable brittle deformation (i.e., tension fractures and brecciation) is also reported, especially in the hinge zone of the fold. The most significant mineralization is reported by Laderoute (1989b) to be centred upon the fold hinge, extending for approximately 45 m on each limb. This gold mineralization is also reported to extend to a depth of at least 110 m. Primary magnetite and secondary chlorite (i.e., a product of greenschist facies metamorphism of the iron formation) in the mineralized zone is reported by Laderoute (1989a) to have been sulphidized to pyrrhotite, pyrite, chalcopyrite and arsenopyrite. Pervasive silicification, including quartz veining and tension fracture filling is also reported in this zone by Laderoute (1989a). Gold occurs in association with the sulphides, most commonly as free grains, but sometimes within sulphides (Laderoute 1989a). The western portion of the A/B zone (originally referred to as the B zone) which is exposed on surface approximately 60 m west of the gold mineralized fold hinge, has been interpreted by Laderoute (1989b) to represent a portion of the iron formation that has been cross-folded into a dome-like structure around a north-northwest striking axis. The A/B zone is also reported to terminate to the north against an interpreted northwest-striking late (D3) fault (Laderoute 1989a). An approximate grade of 0.22 oz/ton Au over an average width of approximately 2 m was estimated for the fold hinge portion of the A/B zone by Laderoute (1989b). Significant gold values were also reported from diamond drilling in the western portions of the A/B zone by Laderoute (1989b). However, no grade estimates were provided for this mineralization. The 1347 Zone is reported by Laderoute (1989b) to be located approximately 300 m west of the A/B Zone. Significant gold values were only reported from one drill hole (CP-89-193) advanced by Noramco in 1989. McGregor (1993) provides a resource estimate of 21,000 tons grading 0.22 oz Au/ton for the anticlinal part of the mineralized structure. Recent diamond drilling by King's Bay Gold (Archibald 2004) in the vicinity of the Southwest Powderhouse Zone has resulted in numerous significant gold intersections.

Mineral Record Details

References

Book - Report on Phase A of a Feasibility Study of the Pickle Crow/Central Patricia Deposits

Publication Number: Date: 1993

Author: McGregor, J.A.

Publisher Name: unpublished report, mineral deposit files

Location: Thunder Bay RGP

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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office